Plaster-block machine



Oct. 9 1923.

-G. H. A. RUBY PLASTER BLOCK MACHINE Filled Oct. 25 1922 4 Sheets-Sheet 1 N mw Oct. -9 ,1923.

G. H. A. RUBY PLASTER BLOCK MACHINE Filed oct. 25.

' 1922 4 sheets-sheet 2 Oct. 9 1923.

G. H. A. RUBY PLASTER BLOCK MACHINE Filed 001'.. 25. 19.22

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Geenen H. a. nung, or rotar Dones, iowa, Assreuon To Janus n. orrrnnn, nauseas, or CHICAGO, Immers.

PLASTER-BLOCK MACHINE.

Application med October 25, 1922. Serial No., 596,754.

To all wwm t mary concern.:

Be it known that I, GEORGE H. A. RUBY,

a citizen of the United States of America, residing at Fort Dodge, in the "county of Webster and State of Iowa, have' invented certain new and useful Improvemnts in Plaster-Block Machines; and I do hereby declare the following to be a `full, clear, and exact description of the invention, such as 1o will enable others skilled in the art to which 1t appertains to make and use the same.

This invention relates to a machine for the making of building blocks of cementitious material, particularly that type of i5 block commonly made from plaster of Paris stucco material wherein for the saving of material without appreciable or detrimental reduction in strength, openings are made lengthwise through the blocks in the making thereof. It is an object and purpose of the present invention to make a machine for the rapid quantity production of the blocks, the present machine being a very marked simplification of the construction of machine shown in my co-pending application for partent Ser. No. 509,805, iled Oct. 24, 1921, particularly in the core drawing means used, the automatic operation thereoi and in the travelling belt structure on which the block lforms are secured. Many other objects and purposes than those stated will appear Yfully and in detail, together with operative constructions for attaining the same, as understanding of the invention is had from the following description, taken in connection with the accompanying drawings, in which,

Fig, 1 iff a longitudinal vertical section Y through the machine of my invention, the core drawing means not being shown in this figure.

Fig. 2 is an enlarged plan view of the corev drawing means, showing cores in the process of withdrawal.

Fig. 3 is a transverse vertical section through the machine at the core drawing means used therewith.

Fig. 4 is a fragmentary enlarged longitudinal section at one end of the machine, showing the construction of the belt used and the chain link drive therefor.

Fig. 5 is a section similar to Fig. 4 but taken on a plane inwardly from the plane of the section shown in Fig. v4,and

'ends of said plate 5'secured thereto.

Fig. 6V is an end elevation of one of the' core mounts, the channel bar on which it is mounted being shown in" cross section.

Like reference characters refer to like parts in the dierent figures of the draw- 1n s.

, n the construction of the machine, shafts l are rotatably mounted on suitable supports atl a distance 'from each other on which a `plurality of large sprocket wheels 2 are secured. use 'three of these wheels on each shaft, though this number is in no sense fixedl or arbitrary.

vA conveyer or belt structure is adapted to pass around the wheels 2, one of the shafts 1 being driven in any 'suitable manner for the moving thereof. The belt or conveyer structure includes a plurality of cross bars of channel iron form with webs 3 and flanges 4, as shown, to the web of each of which a plate 5 is permanently secured, shorter than the bar which at both endsextends a considerable distance beyond the Hooks 6 and 7 are permanently secured at spaced apart intervals to the outersides of the opposite flanges 4 of each bar'under the 'plate 5. With the hooks 6, links 8 are connected and a plate 9 is permanently secured to each three links -8 across thelmachine, said vplate 9 lying in the same plane with plate 85- 5 and being of the same length. Other links 10 connect the links 8 with' the hooks 7 as Shown and afplate 1,1 issecured in the same plane with plates 5 and 9 to the links 10, the plates 11 alsobeing of the same length as plates v5 and 9. In securing the links 6 and 7 to the opposite `flanges 4 of the cross bars, rods 12 are used which lie between and pass through the flanges and through suit able portions of the hooks, being headed or riveted over on their ends, thus securing the hooks and reinforcing the flanges to keep themv lfrom s reading apart.

Through tlie adjacent sides of flanges 4 of the consecutive cross bars, .rod-s 13 are passed, the ends of which are threaded to receive nuts '14 tof/bear against washers 15, the sides of which next to the Hanges are of rounderform as shown in Fig. 5. The rods serve as connecting members for the bars in addition to the links and hooks of the chain structure described and serve to hold the bars from separating under the wear and consequent stretch of the links, the nuts 14 being tightened whenever required to al' adjusted properly.

conveyer construction 'Vertical members' or hinged at 17 to the plates 11 at ways keep the belt-or plates 1G are Aone edge and extend upwardly as shown.

i downwardly as indicated at 19. The chanv.as spaced a 1G form :nels 18 are supported on cross rails 20, at

their ends connected to posts'21, other cross rails 22 connecting the posts vat their upper ends and'passing over the' conveyer member, as shown in Fig. 3. There are a plurality of the posts 21 and cross rails 2()` and 22 in the length of the machine, one short section` ofthe machine being shown in Fig. 2, in which the posts 21 and cross rails are shown distance from each' other.

The three plates 5, 9 and 1l, the first over a cross bar and the others lying one at each side thereof form the bottom of a form for receiving cementitious material. The upwardly extending hingedly connected plates the sides, and the ends for the form are provided by end blocks 23 which are secured at their under edges to the upper sidet of the plates 5, at the ends thereof, their.

end portions extending over the adjacent plates 9 and 11 at the sides of the plates 5. In practice, any suitable `connecting means, indicated at 24 may be used to attach the end blocks 23 to the middle plates 5 of theforms. rl`he lower run of the conveyer is carried on rails 25 positioned lengthwise of the machine in spaced apart relation so that the free edges of the end blocks 23 ride tliereover, as fully shown in Fig. 3.

On the projecting end portions of the cross bars of the conveyer, -core heads are slidablymounted, each head having a channel-shaped form with an up er side 26 and depending sides or flanges 2 so as to bear against 'the' web 3 and flanges 4 of the cross bars, being held against detachment therefrom by plates 28 passing under the lower edges of the flanges 4 and which are connected to the parts 27 by suitable set screws 29 (see Fig. 6). At their inner ends, the core heads are formed with relatively wide upwardly extending integral plates 30, havinr a width substantially equal to the length o the end blocks 23 of the forms, a plurality of cores 31 being permanently secured to each plate 30 and projecting horizontally therefrom to the end blocks 23, entering` openings in` said blocks and being adapted to pass through said openings so that the ends of the cores passing through the opposite end blocks in each form meet and detachably connect together substantially midway between the ends of the forms.' rl`he cores are tapered slightly, reducing sizetoward their inner ends so that the cores pass freely through the openings in blocks 23 therefor, filling and fitting the openingsl building blocks.

Laeaeao! snugly when moved inwardly to inner position.

Projecting upwardly from each part 26 of each core head is a short post 32, `at the upper end of which a roller 33 is rotatably mounted to turn about a vertical axis. An

overhead supporting plate 34 is detachably f connected by means of bolts 35 to and lies between any two vconsecutive upper cross andattached cores outwardly sol that the inner ends ofthe cores are left just within the openings in the end blocks 23 of the building block forms. This withdrawal is slow and easy at the start or during the time when the cores have tobe broken from the cementitious material, afterward being more rapid. After the cores are drawn, the continued movement of the conveyer carries the cores with it'until the same have passed over one of the ends of the machine, whereupon at any desired place in the length of the machine other bars 36 carried on and extending upwardly from supporting plates 34 are reached, being reversely positioned so as to have the rollers 33 engage against the same with a consequentmovement of the cores back into place in the forms for the The blocks 37 made in the forms have longitudinal openings 38 there'- through as many as there are cores used to each form, this mumber being varied in different sizes of building blocks in accordance wasted. The cementitious material when plaster of Paris stucco is used sets. rapidly, and at the proper place beyond the hopper 39 during the time of traverse to which the cementitious material has set sufficiently, `the .core removing cam bars 36- are located, the

cores being automatically withdrawn on passing by 'the same. en thel conveyer carrying the building blocks'with' the cores removed comes to the end of the machine and passes over the wheels 2 at such end,

Vthe bottom plates of the block forms take vertical plates 16 instead of being parallel.

are moved farther apart at their outer portions, separating Yfrom the edges of the blocks 37, the blocks being free to drop from the forms to a conveying belt 40 which carries them away to any proper place of storage. The building blocks 37, accordingly are dropped successively to the belt 40 from the succeeding forms and the production of the blocks is a continuous procedure, a large quantity roduction being had with little labor expenditure.

This construction of building block making machine is relatively simple in construction, continuous in its working, durable and efiicient in allparticulars. The points where the cores are to be withdrawn'are readily changed by merely changing the position of the cam bar holding plates 34, this sometimes being desirable with different setting materials. `No parts or materials therefor are used which are liable to deterioration. The constructionahas proved practical and with it building blocks of the character outlined are produced in quantity at small cost.

I cllaim:

1. In combination with an endless conveye-r mounted horizontally, of a plurality of individual block forms attached to the outer sides of the conveyer, said`forms having ends provided with openingsA therethrough, a plurality of core members in serted through said openings, said core members for each form having inner ends' adapted to detachably join together, a head slidably mounted at each end ofy each form y to which the core members for each end of n form are' secured, a roller on 'eachv head' and cam bars mounted one at each side oi the conveyer with which said rollers suce cessivcly engage to automatically move the heads and attached core members outwardly as the same pass with the conveyer by said cam bars, substantially as described.

2. A construction containing the elements in combination defined in claim l, combined with additional cam bars located one at each `side of the conveyer with which the said rollers .engage to move the heads and attached core members inwardly as the heads are moved by said additional cam bars, substantially as described. u

3'. In combination with an endless. conveyer mountedhorizontally, of a lurality of individual block forms attached to the outer side of the conveyer, said forms having ends provided with core passing openings therethrough, a plurality of core members adapted to pass through said openings, a head at each end of each form to which the core members for each end of a form are secured, outwardly extending bars con-l nected with the conveyer on which said heads are slidably mounted, means with which said heads automatically engage at a predetermined point in the travel of the conveyer to move the said heads and attached core members outwardly, and additionalY means with which saidI heads engage at a second predetermined point in the travel of the conveyer to nove said heads and core members thereon inwardly, substantially as described.

4. In a machine of the class described, an endless conveyer mounted horizontally, a plurality of individual block forms attached to the outer sides ofthe conveyer,'said forms having ends vprovided with core passing openings therethrough, a barl attached to the conveyer below and lengthwise of each form, the bar at each end extending a distance beyond the ends of' its form, a head slidably mounted on each projecting end portion of the bar, core members attached to each ,head to pass through the openings in the end members of the forms, means for automatically slidin-g the heads and attached core members outwardly on reaching a predetermined .pQint in the travel of the conveyer, and means for moving the headsand core members back to inner position, substantially as described. y

5. In a machine of the class described, an endless horizontally located conveyer, a lurality of individual block forms'attache to the outer sides of the conveyer, said forms having ends provided with core passing openings therethrough, a head mounted on the conveyer and movable therewith yat each end of each form, means for mounting said heads for'outward and inward sliding movements with respect to the conveyer, a cam bar mounted in fixed position at each side of the conveyer, and means on said heads engageable with the' cam bar for moving the heads outwardly, said heads having core members attached thereto for passage through lthe openings in the adjacent end of the associated block form, substantially as described.

Width of the conveyer, a plurality of individual block 'forms attached to the outer sidesof the conveyer, one over each channel bar, each having ends provided with core passing openings vtherethrough, a head mounted at each end of each channel bar for free sliding movements thereon, core mem. bers'` attached to the heads and passing through theopenings in the end members of the forms, and means for moving said heads back and forth on the channel bars, substantially as described.

7. In a machine of the class described, an endless horizontally located conveyer, cross bars located transversely across and on the inner sides of the conveyer at spaced apart intervals, said bars being longer than the width of the conveyer, a plurality of individual block forms attached to the outer sides of the conveyer, one over each cross bar, each form having ends formed with core passing openings therethrough, a head slidably mounted on each end portion of Veach cross bar, core members attached to the heads and passing through the said openings in the ends of the forms, an outwardly extending cam bar located at each side of the conveyer and positioned at an. angle to the length of the conveyer, and meanspon the heads to engage with said cam bars for drawing the heads and core members attached thereto ou-twardly on passing said cam bars.

8. In a machine of the class described,

spaced apart shafts, wheels thereon, an endless conveyer construction mounted on the wheels to pass around the same, comprising a plurality of spaced apart cross bars, hooks attached 'to opposite sides'of the cross bars, links connecting the hooks and adapted to engage with 'teeth projecting from the wheels, a plate secured tothe outer side of each cross bar, other plates secured to the links to lie in the same plane with the plates on the cross bars, outwardly extending plates hingedly connected to one of said other plates at one side of each plate attached to the cross bars, and end members connected to each cross bar plate at each end thereof, substantially as described,

9. A construction containing the elements in combination defined in claim .8, combined with heads slidably mounted at each end of each cross bar, said end members having a plurality of openings therethrough, eore members attached to the heads an passing through said openings, means for automatically moving the heads and attached core members outwardly at a predetermined point in the movement of the conveyer, and additional means for automatically moving said heads and' core members inwardly at a further predetermined point in the vmovement of the conveyer.

10. A11 endless conveyer construction comprising spaced apart cross bars, links located between .and connecting the cross bars, Wheels over which the connected links and cross bars pass, a plate attached to the outer side of each cross bar, and additional plates lying alongside of the first plates and connected to said links, substantially as described. l

11. ln a machine of the class described, spaced apart shafts, wheels thereon and endless conveyer construction-mounted to pass around the wheels, a plurality of block forms carried by the conveyer, each form having ends with core passing openings therethrough and each of said forms comprising a bottom havin a central plate, and -a plate lying at each side of the central plate, the ends of the form being attached to the ends of said central plate and extending over-the plates at each side of the central plate, division plates for the forms pivotally connected to the edges of one ofeach of vthe said side plates, a head having a plurality of core members thereon mounted at each end of each form, the cores passing through the GEURGE H. A. RUBY. 

